Help needed badly

[vectraguy]

I fitted the new Grundfos 15-90 boost pump to the hot water cylinder output, and all went well or so I at first thought, but the large cold water header tank was being filled via the vent pipe, and this has stirred up all the clag and the water is coming out brownish.

My main first concern is how can I empty the header tank which holds about 50 gallons, I thought of syphoning but havn't got the gear, so if I tie up the ball cock and then turn on all the hot water taps will that do any harm due to the dirty water passing through the cylinder, what it's doing now anyway.

I have put a flexi bypass tube across the pump so the vent problem can wait until I've hopefully sorted the big tank.

Any help or advice most appreciated.

Regards vectraguy.

 

[doitall]

If water is coming out the vent pipe, either you have a backflow problem or the coil has gone.

Assuming you fitted the pump the right way round, and to spec.

Perhaps a pic where you fitted it would be the first plan.

 

[Agile]

Normally the tank would also supply the cold water in the bath so could be drained from there.

Dont do it from the hot otherwise the dirt will be moved into the hot tank even more.

Sounds like a DIY job gone wrong. Might have been better to get a professional to do it for you.

Tony

 

[vectraguy]

Normally the tank would also supply the cold water in the bath so could be drained from there.

Dont do it from the hot otherwise the dirt will be moved into the hot tank even more.

Sounds like a DIY job gone wrong. Might have been better to get a professional to do it for you.

Tony

Hi Agile the cold water is direct from the mains wih no tank, and the large tank above the cylinder supplies just the HW cylinder.

I cut the horizontal pipe coming from the top of the cylinder and connected the pump input direct to that, and the pump out put to the same pipe continuation which is about 3 inches from the T junction being down for hot water and up for vent.

It seems the pump is able to supply the taps ok but is also pushing the same water uphill into the tank via the vent tube.

As I said that is not my immediate concern, but before the wife comes home, how to clear and clean the header tank, can I not just let it run through the cylinder to the taps until clear water appears.

Regards vectraguy.

 

[seco services]

so you've put the pump before the vent pipe.
then its going to pump up the vent.

 

[vectraguy]

so you've put the pump before the vent pipe.
then its going to pump up the vent.

Yes I have so should the pump output connection have been lower down the vertical pipe from the T piece?

vectraguy.

 

[Agile]

Then its only behaving as we would expect.

My advice is to drain it from the hot then but with the pump depowered as you should still get a reasonable form through it.

Empty it first with the valve tied up!

This shows just how problematic DIY can be if you rush into a job without researching to matter first.

Tony

 

[Razor900]

Lets hope no one turns off the service valves to the pump

It should have been fitted with a surrey flange or similar

 

[vectraguy]

Then its only behaving as we would expect.

My advice is to drain it from the hot then but with the pump depowered as you should still get a reasonable form through it.

Empty it first with the valve tied up!

This shows just how problematic DIY can be if you rush into a job without researching to matter first.

Tony

I quite agree with your wise comments about DIY Tony and when this problem is put right I'l never touch plumbing again.

So can I just turn the hot taps on with the ball cock tied up and let it run, no problem with having the pump depowered because it's no longer connected to the water in or out, and the circuit is completed with a speedfit flexi in place of the pump.

Thanks for your help Tony.

vectraguy.

 

[Garfeild]

Did you not get a set of instructions with the pump to show exactly how to plumb it in?
Its ok for you to do DIY plumbing,thousands do,but theres no harm in asking advice first,or,make sure youve read and understood the instructions.

 

[vectraguy]

Did you not get a set of instructions with the pump to show exactly how to plumb it in?
Its ok for you to do DIY plumbing,thousands do,but theres no harm in asking advice first,or,make sure youve read and understood the instructions.

Hello Garfield yes I did but they were not very good ones, and using pictures rather than words, and non of the pictures illustrated my requirement of boosting a hot water mixer/shower tap assembly, which is surprising considering the pump model is mainly intended for that purpose.

I did do loads of research for over a week looking for the correct method of application, and the one I finally settled on was this

http://www.stuart-turner.co.uk/media/5297-installation_manual_showermate.pdf
see the first two from the left page 6 Fig 9 and that is how I did it.

Regards vectraguy.

 

[XKESTONMAN]

for safety point,make sure cold feed to pump from storage tank is lower
than cold feed to hot water cylinder,if tank runs dry to prevent scalding.
get a plumber to fit.

 

[vectraguy]

for safety point,make sure cold feed to pump from storage tank is lower
than cold feed to hot water cylinder,if tank runs dry to prevent scalding.
get a plumber to fit.

Sorry m8 there is no cold feed to pump it is in the hot output of the HW cylinder.

vectraguy.

 

[vectraguy]

To sum up the present situation, I allowed the corrupted header tank to empty via the HW cylinder and hot taps until it was completely empty which gave me an opportunity to really clean out the tank which had been accumulating rubbish for more than 12 years and it looks good with nice clear water.

That was one big plus, but I am now still left with the problem of how do I arrange the pump pipe work to prevent hot water output from the pump arriving at the feed header tank via the vent tube.

Am I right in thinking the pump input from the cylinder top connection is ok and just the pump output connection needs re siting away from the vent pipe.

If that is the case where do I connect the pump output to avoid that happening.

Regards vectraguy

 

[seco services]

you connected your pump between the cylinder and vent
not a spur off the horizontal pipe from the cylinder.